Drove up to Mukdahan/Savannakhet during the week, applied for Non O dependency for my Thai kids, not married nor do I have custody or papers from local amphur, also do not need to show proof of funds. Simple and easy process no booking and small cues.
Paperwork supplied.
Passport photos x2
Kids birth certificate origional and copy
Blue house book copy where kids live
Blue house book copy where kids mother lives
Copy kids mother ID card
Copy of kids mother passport (this was actually expired)